Spectral gamma-ray signatures of cosmological dark matter annihilations.
Spectral gamma-ray signatures of cosmological dark matter annihilations.
复制标题
宇宙暗物质湮灭的光谱伽马射线特征。
DOI：
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发表时间：
2001
影响因子：
8.6
通讯作者：
P. Ullio
中科院分区：
文献类型：
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作者：
Lars Bergstrom;J. Edsjo;P. Ullio
我们提出了一个新的签名弱相互作用大质量粒子（WIMP）暗物质，在弥漫的河外伽玛射线辐射的光谱特征。这种特征，即在与WIMP质量对应的能量处伽马射线强度突然下降，来自于宇宙学红移引起的WIMP湮灭为两条伽马射线而导致的线的不对称扭曲。不像其他提出的搜索线信号，这种方法是不是很敏感的晕和subhalos的确切的暗物质密度分布。
We propose a new signature for weakly interacting massive particle (WIMP) dark matter, a spectral feature in the diffuse extragalactic gamma-ray radiation. This feature, a sudden drop of the gamma-ray intensity at an energy corresponding to the WIMP mass, comes from the asymmetric distortion of the line due to WIMP annihilation into two gamma rays caused by the cosmological redshift. Unlike other proposed searches for a line signal, this method is not very sensitive to the exact dark matter density distribution in halos and subhalos.